新幹線用パンタグラフの揚力特性に起因した舟体挙動に対する基礎的理論検討

（舟体が下方に初速をもって運動を開始した場合の運動解析）

抄録

In order for Shinkansen pantograph to exert good current collection performance, it is important to keep appropriate pantograph lift force during high-speed operation. In particular, lift force characteristics of the pantograph head is designed in consideration of changes in the external shape due to wear of the contact strip. However, in rare cases, lift force may decrease depending on the extraordinary wear of contact strip or other unexpected damage of pantograph head. When an external force is applied to the pantograph head in that state, long-time contact loss may occur, and it is important to understand the relationship between lift force characteristics and dynamic behavior of pantograph head. Therefore, based on simple mechanical model, we conducted a theoretical study of pantograph head behavior in various lift force characteristics and clarified the relationship between difference in initial speed and behavior of the pantograph head.